Great Business Articles
All business related articles and more here on the web
Featured Articles
    Networking and the Internet
Office Products
    CD-R, DVD-R, Blank Media
    Copiers & Copier Supplies
    Fax Machines & Supplies
    Microfilm & Microfiche
    Office Equipment
    Office Furniture
    Presentation, AV, Projectors
    Shredders
    Supplies & Small Equipment
    Trade Show Displays
    Other Office Products
    Wholesale Lots
Apple Computers & Components
    Apple Accessories
    Apple Components
    Apple Desktops
    Apple Laptops & Notebooks
    Apple Networking
    Apple Printers, Scanners & Ink
    Vintage Apple
    Wholesale Lots
    Other
Computers
    Acer
    Alienware
    Asus
    Dell
    Gateway
    HP, Compaq
    IBM, Lenovo
    Sony
    Whitebox, Custom Systems
Printers
Printer Supplies & Accessories
    Cleaning, Repair Kits
    Feeders, Trays
    Ink Cartridges
    Ink Refill Kits
    Ink Ribbons
    Laser Drum Cartridges, Fusers
    Laser Toner
    Power Supplies
    Print Heads
    Printer Memory
    Printer Paper
    Sign Vinyl
    Other
Retail Equipment & Supplies
    Beauty & Salon Equipment
    Labeling & Tagging Supplies
    Mannequins & Dress Forms
    Racks & Fixtures
    Security & Surveillance
    Shopping Carts & Baskets
    Other
Plastics
    Auxiliary Process Equipment
    Injection, Blow Molding
    Molds, Dies
    Raw Materials & Scrap
    Other Items
Manufacturing & Metalworking
    Manufacturing Equipment
    Metalworking Equipment
    Metalworking Tooling, Supplies
    Process Equipment
    Metals & Alloys
    Semiconductor & PCB Equipment
    Textile & Apparel Equipment
    Welding
    Woodworking
    Other
Industrial Equipment, MRO
    Adhesives & Sealant
    Cleaning Equipment & Supplies
    Commercial Radios
    Compressors
    Fasteners & Hardware
    Forklifts & Other Lifts
    Forklift Parts & Accessories
    Government & Public Safety
    HVAC
    Hydraulics & Pneumatics
    Lighting & Lasers
    Industrial Automation, Control
    Manuals, Books
    Forklifts & Material Handling
    Painting Equipment & Supplies
    Motors, Transmissions
    Professional Tools & Hardware
    Pumps & Plumbing
    Pumps
    Safety & Security
    Wholesale Lots
    Other
Construction
    Building Materials, Supplies
    Buildings, Modular & Pre-Fab
    Construction Equipment

Industrial Equipment, MRO

HVAC

HVAC Article

HVAC (pronounced either "H-V-A-C" or, occasionally, "aitch-vak") is an initialism/acronym that stands for "heating, ventilation, and air conditioning". HVAC is sometimes referred to as "climate control" and is particularly important in the design of medium to large industrial and office buildings such as sky scrapers and in marine environments such as aquariums, where humidity and temperature must all be closely regulated whilst maintaining safe and healthy conditions within. In certain regions (e.g., UK) the term "Building Services" is also used, but may also include plumbing and electrical systems. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilation is dropped as HACR (such as the designation of HACR-rated circuit breakers).

Heating, ventilation, and air conditioning is based on the basic principles of thermodynamics, fluid mechanics, and heat transfer, and to inventions and discoveries made by Michael Faraday, Willis Carrier, Reuben Trane, James Joule, William Rankine, Sadi Carnot, and many others. The invention of the components of HVAC systems goes hand-in-hand with the industrial revolution, and new methods of modernization, higher efficiency, and system control are constantly introduced by companies and inventors all over the world.

The three functions of heating, ventilation, and air-conditioning are closely interrelated. All seek to provide thermal comfort, acceptable indoor air quality, and reasonable installation, operation, and maintenance costs. HVAC systems can provide ventilation, reduce air infiltration, and maintain pressure relationships between spaces. How air is delivered to, and removed from spaces is known as room air distribution.

HVAC Items

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Search:  
SPX ROBINAIR VacuMaster 2 Stage Vacuum Pump 15500
$81.50
Johnson Control DX-9100-8454 Brand New in open Box
$300.00
TIF TIF9030 Compact Refrigerant Scale HVAC/r Tool
$154.95
Halogen Refrigerant Leak Detector HVAC/R Tool New Model
$99.00
COPPUS CADET CAC1 CENTRIFUGAL BLOWER 1/2 HP MOTOR
$26.00
Spencer Turbo Compressor 5HP 3500 rpm
$249.00
JOHNSON CONTROLS T22AAA-1C HEATING THERMOSTAT NEW
$25.00
New Automatic Halogen Refrigerant Freon Leak Detector
$39.99
Manifold Gauge 5'High Pressure Hose R407 R134A R404 R22
$38.00
Magnetek Industrial Exhaust Blower 220V
$175.00
suntec
$25.00
EXHAUST FAN Commercial - Direct Drive - 24" - 1/2 Hp
$422.00
MALCO PIPE CRIMPER *C5*
$9.05
UE 24-013 Series Differential Pressure Switch
$15.00
Air Conditioner Venturi Type AC Vacuum Pump R12 R134a
$16.58
Refrigeration Flare Tool
$34.00
Fan Engineering Model 4BCS Blower Wheel
$10.00
New 12" Round Kruege Steel Louvered Diffusers Model1400
$44.66
12000 Btu PTAC Package Terminal Air Conditioner Heating
$658.00
Core Removal Tool & Line Tap Valves II
$40.00
Imperial Kwik Charge HVAC liquid low side charger 535-C
$19.99
Air-Vac A/C Vacuum Pump Evacuation R-134A R22 R12 NEW
$24.99
TRANE EMI FILTER BOARD FOR XV1500 SYSTEMS
$15.00
Yellow Jacket HVAC Sealright TM Coupler for Gauges
$7.50
New 10" Rnd. Krueger Steel Louvered Diffuser Model 1400
$44.66
Nu-Calgon C-4 Refrigeration Oil
$0.99
CSU 50KW HEATER - heat BIG Warehouse office building
$1500.00
CPS Refrigerant Scale
$62.74
Bell & Gossett 1531 Series Pump 175 PSI 1800 RPM WORKNG
$34.99
HVAC Air Conditioning * Heating Ventilation 19 books CD
$0.89
HVAC Turbo 200 Mini Motor-Run, New in Box
$1.49
Halogen Refrigerant Freon Leak Detector AC/HVAC/R Tool
$69.95
19 Book CD HVAC * Air Conditioning ! HEATING Manuals CD
$0.99
J/B 7CFM SINGLE STAGE VACUUM PUMP MODEL DV200
$125.00
C31- Lot of 2 ASCO Red-Hat Valves T 410372 8264G9 1/8NC
$9.99
GOSSWELD TORCH KIT WITH PLASTIC STAND
$81.00
New 12" Round Kruege Steel Louvered Diffusers Model1400
$44.66
Thermal Zone 200 Alkylebenzene Refrigeration Oil
$0.99
Siemens Matlock High Volume Industrial Air Blower 220V
$325.00
New 10" Round Krueger Steel Perforated Diffuser 6500
$43.66
New 10" Rnd. Krueger Steel Louvered Diffuser Model 1400
$44.66
ROBINAIR New 5.0 CFM Vacuum Pump 2stage Refrigeration
$219.99
Fireye UV1A6 ULTRA-VIOLET SCANNER NEW IN BOX
$51.00
Sheet Metal Crimping Tool
$10.50
R-410A Refrigerant Gauges W/ Hoses & Manifold
$55.00
G E Motor Run Capacitor 15 Microfarad New
$2.95
bitzer 7 ton compressors
$12000.00
J/B COPPER VALVES FITTINGS LOT ACCESS CONTROL COUPLERS
$75.00
baseboard heat thermostat
$0.99
INFICON D-TEK SELECT REFRIGERANT LEAK DETECTOR-NEW
$365.00
New 8" Round Krueger Steel Louvered Diffuser Model 1400
$44.66
Robinair Refrig.Flaring Tool Set of 6 aka (swedger)
$17.50
LOT OF 15 ELECTRIC WALL HEATER HEATING THERMOSTATS
$14.99
Lamson Corp 10 HP Industrial Air Blower
$345.00
Carrier Synthetic Screw Compressor Oil SW220 POE
$59.99
General Electric 3/4 HP Blower 110v 3450 rpm
$75.00
NEW COPELAND M2FH-0017-SAA-106 REFRIGERATION CONDENSOR
$49.99
New 12" Round Krueger Steel Perforated Diffuser 6500
$43.66
Centrifugal Blower Fan - Never used
$25.00
TIF 9010A SLIMLINE A/C ELECTRONIC REFRIGERANT SCALE
$69.00
Kestrel 4100 HVAC Pocket Air Flow Tracker Monitor NEW
$239.00
TRANE TRR0616 TRANSFORMER FOR XV1500 SYSTEMS
$5.00
Baldor Model VM3713T 15HP Motor - 2 ea.
$100.00
CPS CC220 Compute a charge Scale
$65.00
HVAC Spectroline EZ-JECT dye injector leak finder
$48.00
GE ELECTIC MOTOR 1 HP 460V PH 1 AND 30 " PROP FAN
$350.00
Stinger # 2000 Refrigerant Recovery Equipment System
$299.99
NEW RINNAI 20" Vent Extension Kit FOT-102 NIB
$4.99
Nu-Calgon Emkarate POE RL32CF Refrigeration Oil
$5.99
IS LKD100 Combustible Gas Methane Leak Detector
$15.99
INFICON WHISPER ULTRASONIC LEAK DETECTOR-NEW
$195.00
Carrier Synthetic Centrifugal Oil POE EmkarateRL32H/68H
$49.99
New 12" Round Krueger Steel Perforated Diffuser 6500
$43.66
New 10" Round Krueger Steel Perforated Diffuser 6500
$43.66
BROAN MFG. CO. 97005045 120V FAN ASSEMBLY 70 CFM
$14.99
New Dayton Commercial Fan Direct Drive Air Circulator
$199.00
110V Blower Fan
$36.88
NEW 5238 BTU Air Conditioner Compressor
$6.95
Bryant, Carrier & Payne Defrost Board CES0110063-02
$85.00
Honeywell TotalZone4 control module
$6.50
Promax recovery unit*refrigeration* # RG5410a Amprobe
$280.55
ROBINAIR 14777 Electronic Vacuum Gauge HVAC/r Tools
$154.95
New 6" Round Krueger Steel Louvered Diffuser Model 1400
$44.66
Blower, Dayton Electric
$30.00
Watsco WC-5 Refrigerator Recovery System *AS IS*
$75.00
Fan Engineering Model 4BCS Blower Wheel
$10.00
New 8" Round Krueger Steel Louvered Diffuser Model 1400
$44.66
A/C MANIFOLD GAUGE SET A C R134a W/ CARRYING CASE
$30.87
A/C MANIFOLD GAUGE SET A C R134a
$12.37
Evaporator Fan Motor
$20.00
Compressor Repair Parts II
$30.00
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
Lamson Corp Industrial Blower with 5HP Motor
$275.00
Mini Tube Tubing Cutter Plumbing HVAC Tool 1/8-5/8" OD
$7.95
REGO LV404B96 COMPACT TWIN STAGE LP PROPANE REGULATOR
$35.00
JOHNSON CONTROLS Unitary Controller AS-UNT1144-0 NEW
$125.00
Round 35 + 5 uf mfd 370 Volts Dual Motor Run Capacitor
$7.84
INTERLINK 5008TS REFRIGERATION 1/15 HP MOTOR - NEW
$69.99
Sheet Metal Hand Seamer
$15.50